Subject	Improved flow does not equate to improved cooling
Posted by	lazersos on April 20, 2004 at 6:12 PM
	This message has been viewed 591 times.
In Reply To	While what you have done may improve cooling of the engine posted by zxjpmzx on April 20, 2004 at 12:43 PM
Message	The rotary guys found this out early on. Since their engine basically comes apart in vivisections they can port their water passages and get them really smooth. What they found out was that if the water passages become machined surfaces the water flows too fast at the surface of the passage. What you really want is turbulent flow at the coolant/passage interface and laminar flow at the center of the passage. So be careful. Granted casting flash always hinders fluid flow, due to restrictions they can cause and possibility of cavitation in the coolant passages. What would be really helpful is for someone to find the hot spots in the block after removeing the flash, then machine fins to increase surface area in the part of the water passage to help disapate more heat into the coolant. Just my thoughts on this. Good writeup. ======================================================== "I have no experience with this specific pump so don't continue reading expecting to find you answers." - ZLover4Life 07:14 3/16/04
Follow Ups	How To Remove Iron Flashing From Coolant Galleys - PunkZTT(Phoenix) 02:32:54 04/20/04 VTF! (n/m) - maxboost83 02:41:59 04/20/04 2nd (n/m) - Southern_Z [IL] 03:00:19 04/20/04 Got my VTFAQ:) (n/m) - Zenn 03:03:04 04/20/04 My block has the flashing removed. Highly recommended! VTF (n/m) - bb0ys (MA) 07:58:38 04/20/04 Did you pop the freeze plugs to get all the way back? - Woody75 (Denver) 08:53:22 04/20/04 No I didn't think of that, have you done it? (n/m) - PunkZTT(Phoenix) 12:24:40 04/20/04 Yes, it's the typical way. - Woody75 (Denver) 15:32:09 04/20/04 thanks man, i was wondering what people were talking - NA300zx (OH) 08:58:52 04/20/04 VTFAQ!! But is that the only place where there is flash? (n/m) - BigTDogg (MA) 09:08:51 04/20/04 Nope. The water passage is by far the worst but there - Milo (Sport Z Magazine) 16:23:31 04/20/04 my experience >>> - yellowzxtt 10:00:22 04/20/04 Good job...... BUT - Milo (Sport Z Magazine) 10:09:36 04/20/04 While what you have done may improve cooling of the engine - zxjpmzx 12:43:32 04/20/04 Improved flow does not equate to improved cooling - lazersos 18:12:36 04/20/04 hmm.. - PunkZTT(Phoenix) 19:11:43 04/20/04 Don't get me wrong - lazersos 21:56:59 04/20/04 This is why I did not VTF. Nothing really proved here - robo (sebring1970) 01:56:24 04/21/04 I think it is helpful... - PunkZTT(Phoenix) 16:05:23 04/21/04 just my personal opinion, good post overall. I can relate - robo (sebring1970) 03:55:07 04/22/04 I just took offense to your post... - PunkZTT(Phoenix) 04:10:13 04/22/04 no offense or rudeness intended. as much as possible, - robo (sebring1970) 05:10:49 04/22/04 >>> - yellowzxtt 11:34:42 04/21/04 The front is worse than the back... - PunkZTT(Phoenix) 16:00:49 04/21/04
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